API:Invalid signature

[kopax]

Problem

I am having the following code in index.js and I'm trying to call a private api endpoint:

const key          = 'FWdFaXOLt8B4ihmGC6a....4kTEMH8LffmLWt'; // API Key
const secret       = 'fo1Ck2I5VRwqZBWcE1FCcwqdqC....IReqqwd8C9r...A=='; // API Private Key
const KrakenClient = require('kraken-api');
const kraken       = new KrakenClient(key, secret');
(async () => {
	try {
		// Display user's balance
		console.log(await kraken.api('Balance'));
		// Get Ticker Info
		console.log(await kraken.api('Ticker', { pair : 'XXBTZUSD' }));
	} catch (e) {
		console.log(e);
	}
})();

When I run node index.js;

Expected

To read the Balance

Result

Error: General:Permission denied
    at rawRequest (home/me/worpskace/project-kraken/node_modules/kraken-api/kraken.js:54:9)
    at <anonymous>
    at process._tickCallback (internal/process/next_tick.js:160:7)

Reproduction:

Version used : [email protected]
Node: v9.6.0
Npm: 5.6.0

Extract an API key with read permissions.

[hackmin]

It could be the 2 factor authentification. I have the same issue meanwhile the same code worked before double authent. Did you resolve that ?